| /* |
| * linux/fs/nfs/nfs3xdr.c |
| * |
| * XDR functions to encode/decode NFSv3 RPC arguments and results. |
| * |
| * Copyright (C) 1996, 1997 Olaf Kirch |
| */ |
| |
| #include <linux/param.h> |
| #include <linux/time.h> |
| #include <linux/mm.h> |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/in.h> |
| #include <linux/pagemap.h> |
| #include <linux/proc_fs.h> |
| #include <linux/kdev_t.h> |
| #include <linux/sunrpc/clnt.h> |
| #include <linux/nfs.h> |
| #include <linux/nfs3.h> |
| #include <linux/nfs_fs.h> |
| #include <linux/nfsacl.h> |
| #include "internal.h" |
| |
| #define NFSDBG_FACILITY NFSDBG_XDR |
| |
| /* Mapping from NFS error code to "errno" error code. */ |
| #define errno_NFSERR_IO EIO |
| |
| /* |
| * Declare the space requirements for NFS arguments and replies as |
| * number of 32bit-words |
| */ |
| #define NFS3_fhandle_sz (1+16) |
| #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ |
| #define NFS3_sattr_sz (15) |
| #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) |
| #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) |
| #define NFS3_fattr_sz (21) |
| #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) |
| #define NFS3_wcc_attr_sz (6) |
| #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) |
| #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) |
| #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) |
| #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
| |
| #define NFS3_getattrargs_sz (NFS3_fh_sz) |
| #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) |
| #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
| #define NFS3_accessargs_sz (NFS3_fh_sz+1) |
| #define NFS3_readlinkargs_sz (NFS3_fh_sz) |
| #define NFS3_readargs_sz (NFS3_fh_sz+3) |
| #define NFS3_writeargs_sz (NFS3_fh_sz+5) |
| #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) |
| #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) |
| #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) |
| #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) |
| #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
| #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) |
| #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) |
| #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) |
| #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) |
| #define NFS3_commitargs_sz (NFS3_fh_sz+3) |
| |
| #define NFS3_getattrres_sz (1+NFS3_fattr_sz) |
| #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) |
| #define NFS3_removeres_sz (NFS3_setattrres_sz) |
| #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) |
| #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) |
| #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) |
| #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3) |
| #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) |
| #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) |
| #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) |
| #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) |
| #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2) |
| #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) |
| #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) |
| #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) |
| #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) |
| |
| #define ACL3_getaclargs_sz (NFS3_fh_sz+1) |
| #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \ |
| XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) |
| #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \ |
| XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) |
| #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) |
| |
| /* |
| * Map file type to S_IFMT bits |
| */ |
| static const umode_t nfs_type2fmt[] = { |
| [NF3BAD] = 0, |
| [NF3REG] = S_IFREG, |
| [NF3DIR] = S_IFDIR, |
| [NF3BLK] = S_IFBLK, |
| [NF3CHR] = S_IFCHR, |
| [NF3LNK] = S_IFLNK, |
| [NF3SOCK] = S_IFSOCK, |
| [NF3FIFO] = S_IFIFO, |
| }; |
| |
| /* |
| * While encoding arguments, set up the reply buffer in advance to |
| * receive reply data directly into the page cache. |
| */ |
| static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, |
| unsigned int base, unsigned int len, |
| unsigned int bufsize) |
| { |
| struct rpc_auth *auth = req->rq_cred->cr_auth; |
| unsigned int replen; |
| |
| replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; |
| xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); |
| } |
| |
| /* |
| * Handle decode buffer overflows out-of-line. |
| */ |
| static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) |
| { |
| dprintk("NFS: %s prematurely hit the end of our receive buffer. " |
| "Remaining buffer length is %tu words.\n", |
| func, xdr->end - xdr->p); |
| } |
| |
| |
| /* |
| * Encode/decode NFSv3 basic data types |
| * |
| * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: |
| * "NFS Version 3 Protocol Specification". |
| * |
| * Not all basic data types have their own encoding and decoding |
| * functions. For run-time efficiency, some data types are encoded |
| * or decoded inline. |
| */ |
| |
| static void encode_uint32(struct xdr_stream *xdr, u32 value) |
| { |
| __be32 *p = xdr_reserve_space(xdr, 4); |
| *p = cpu_to_be32(value); |
| } |
| |
| static int decode_uint32(struct xdr_stream *xdr, u32 *value) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| *value = be32_to_cpup(p); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static int decode_uint64(struct xdr_stream *xdr, u64 *value) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 8); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| xdr_decode_hyper(p, value); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * fileid3 |
| * |
| * typedef uint64 fileid3; |
| */ |
| static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) |
| { |
| return xdr_decode_hyper(p, fileid); |
| } |
| |
| static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) |
| { |
| return decode_uint64(xdr, fileid); |
| } |
| |
| /* |
| * filename3 |
| * |
| * typedef string filename3<>; |
| */ |
| static void encode_filename3(struct xdr_stream *xdr, |
| const char *name, u32 length) |
| { |
| __be32 *p; |
| |
| BUG_ON(length > NFS3_MAXNAMLEN); |
| p = xdr_reserve_space(xdr, 4 + length); |
| xdr_encode_opaque(p, name, length); |
| } |
| |
| static int decode_inline_filename3(struct xdr_stream *xdr, |
| const char **name, u32 *length) |
| { |
| __be32 *p; |
| u32 count; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| count = be32_to_cpup(p); |
| if (count > NFS3_MAXNAMLEN) |
| goto out_nametoolong; |
| p = xdr_inline_decode(xdr, count); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| *name = (const char *)p; |
| *length = count; |
| return 0; |
| |
| out_nametoolong: |
| dprintk("NFS: returned filename too long: %u\n", count); |
| return -ENAMETOOLONG; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * nfspath3 |
| * |
| * typedef string nfspath3<>; |
| */ |
| static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, |
| const u32 length) |
| { |
| BUG_ON(length > NFS3_MAXPATHLEN); |
| encode_uint32(xdr, length); |
| xdr_write_pages(xdr, pages, 0, length); |
| } |
| |
| static int decode_nfspath3(struct xdr_stream *xdr) |
| { |
| u32 recvd, count; |
| size_t hdrlen; |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| count = be32_to_cpup(p); |
| if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) |
| goto out_nametoolong; |
| hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; |
| recvd = xdr->buf->len - hdrlen; |
| if (unlikely(count > recvd)) |
| goto out_cheating; |
| |
| xdr_read_pages(xdr, count); |
| xdr_terminate_string(xdr->buf, count); |
| return 0; |
| |
| out_nametoolong: |
| dprintk("NFS: returned pathname too long: %u\n", count); |
| return -ENAMETOOLONG; |
| out_cheating: |
| dprintk("NFS: server cheating in pathname result: " |
| "count %u > recvd %u\n", count, recvd); |
| return -EIO; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * cookie3 |
| * |
| * typedef uint64 cookie3 |
| */ |
| static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) |
| { |
| return xdr_encode_hyper(p, cookie); |
| } |
| |
| static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) |
| { |
| return decode_uint64(xdr, cookie); |
| } |
| |
| /* |
| * cookieverf3 |
| * |
| * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; |
| */ |
| static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) |
| { |
| memcpy(p, verifier, NFS3_COOKIEVERFSIZE); |
| return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); |
| } |
| |
| static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| memcpy(verifier, p, NFS3_COOKIEVERFSIZE); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * createverf3 |
| * |
| * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; |
| */ |
| static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) |
| { |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); |
| memcpy(p, verifier, NFS3_CREATEVERFSIZE); |
| } |
| |
| static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| memcpy(verifier, p, NFS3_WRITEVERFSIZE); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * size3 |
| * |
| * typedef uint64 size3; |
| */ |
| static __be32 *xdr_decode_size3(__be32 *p, u64 *size) |
| { |
| return xdr_decode_hyper(p, size); |
| } |
| |
| /* |
| * nfsstat3 |
| * |
| * enum nfsstat3 { |
| * NFS3_OK = 0, |
| * ... |
| * } |
| */ |
| #define NFS3_OK NFS_OK |
| |
| static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| *status = be32_to_cpup(p); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * ftype3 |
| * |
| * enum ftype3 { |
| * NF3REG = 1, |
| * NF3DIR = 2, |
| * NF3BLK = 3, |
| * NF3CHR = 4, |
| * NF3LNK = 5, |
| * NF3SOCK = 6, |
| * NF3FIFO = 7 |
| * }; |
| */ |
| static void encode_ftype3(struct xdr_stream *xdr, const u32 type) |
| { |
| BUG_ON(type > NF3FIFO); |
| encode_uint32(xdr, type); |
| } |
| |
| static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) |
| { |
| u32 type; |
| |
| type = be32_to_cpup(p++); |
| if (type > NF3FIFO) |
| type = NF3NON; |
| *mode = nfs_type2fmt[type]; |
| return p; |
| } |
| |
| /* |
| * specdata3 |
| * |
| * struct specdata3 { |
| * uint32 specdata1; |
| * uint32 specdata2; |
| * }; |
| */ |
| static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) |
| { |
| __be32 *p; |
| |
| p = xdr_reserve_space(xdr, 8); |
| *p++ = cpu_to_be32(MAJOR(rdev)); |
| *p = cpu_to_be32(MINOR(rdev)); |
| } |
| |
| static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) |
| { |
| unsigned int major, minor; |
| |
| major = be32_to_cpup(p++); |
| minor = be32_to_cpup(p++); |
| *rdev = MKDEV(major, minor); |
| if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) |
| *rdev = 0; |
| return p; |
| } |
| |
| /* |
| * nfs_fh3 |
| * |
| * struct nfs_fh3 { |
| * opaque data<NFS3_FHSIZE>; |
| * }; |
| */ |
| static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) |
| { |
| __be32 *p; |
| |
| BUG_ON(fh->size > NFS3_FHSIZE); |
| p = xdr_reserve_space(xdr, 4 + fh->size); |
| xdr_encode_opaque(p, fh->data, fh->size); |
| } |
| |
| static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
| { |
| u32 length; |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| length = be32_to_cpup(p++); |
| if (unlikely(length > NFS3_FHSIZE)) |
| goto out_toobig; |
| p = xdr_inline_decode(xdr, length); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| fh->size = length; |
| memcpy(fh->data, p, length); |
| return 0; |
| out_toobig: |
| dprintk("NFS: file handle size (%u) too big\n", length); |
| return -E2BIG; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static void zero_nfs_fh3(struct nfs_fh *fh) |
| { |
| memset(fh, 0, sizeof(*fh)); |
| } |
| |
| /* |
| * nfstime3 |
| * |
| * struct nfstime3 { |
| * uint32 seconds; |
| * uint32 nseconds; |
| * }; |
| */ |
| static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) |
| { |
| *p++ = cpu_to_be32(timep->tv_sec); |
| *p++ = cpu_to_be32(timep->tv_nsec); |
| return p; |
| } |
| |
| static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep) |
| { |
| timep->tv_sec = be32_to_cpup(p++); |
| timep->tv_nsec = be32_to_cpup(p++); |
| return p; |
| } |
| |
| /* |
| * sattr3 |
| * |
| * enum time_how { |
| * DONT_CHANGE = 0, |
| * SET_TO_SERVER_TIME = 1, |
| * SET_TO_CLIENT_TIME = 2 |
| * }; |
| * |
| * union set_mode3 switch (bool set_it) { |
| * case TRUE: |
| * mode3 mode; |
| * default: |
| * void; |
| * }; |
| * |
| * union set_uid3 switch (bool set_it) { |
| * case TRUE: |
| * uid3 uid; |
| * default: |
| * void; |
| * }; |
| * |
| * union set_gid3 switch (bool set_it) { |
| * case TRUE: |
| * gid3 gid; |
| * default: |
| * void; |
| * }; |
| * |
| * union set_size3 switch (bool set_it) { |
| * case TRUE: |
| * size3 size; |
| * default: |
| * void; |
| * }; |
| * |
| * union set_atime switch (time_how set_it) { |
| * case SET_TO_CLIENT_TIME: |
| * nfstime3 atime; |
| * default: |
| * void; |
| * }; |
| * |
| * union set_mtime switch (time_how set_it) { |
| * case SET_TO_CLIENT_TIME: |
| * nfstime3 mtime; |
| * default: |
| * void; |
| * }; |
| * |
| * struct sattr3 { |
| * set_mode3 mode; |
| * set_uid3 uid; |
| * set_gid3 gid; |
| * set_size3 size; |
| * set_atime atime; |
| * set_mtime mtime; |
| * }; |
| */ |
| static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) |
| { |
| u32 nbytes; |
| __be32 *p; |
| |
| /* |
| * In order to make only a single xdr_reserve_space() call, |
| * pre-compute the total number of bytes to be reserved. |
| * Six boolean values, one for each set_foo field, are always |
| * present in the encoded result, so start there. |
| */ |
| nbytes = 6 * 4; |
| if (attr->ia_valid & ATTR_MODE) |
| nbytes += 4; |
| if (attr->ia_valid & ATTR_UID) |
| nbytes += 4; |
| if (attr->ia_valid & ATTR_GID) |
| nbytes += 4; |
| if (attr->ia_valid & ATTR_SIZE) |
| nbytes += 8; |
| if (attr->ia_valid & ATTR_ATIME_SET) |
| nbytes += 8; |
| if (attr->ia_valid & ATTR_MTIME_SET) |
| nbytes += 8; |
| p = xdr_reserve_space(xdr, nbytes); |
| |
| if (attr->ia_valid & ATTR_MODE) { |
| *p++ = xdr_one; |
| *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); |
| } else |
| *p++ = xdr_zero; |
| |
| if (attr->ia_valid & ATTR_UID) { |
| *p++ = xdr_one; |
| *p++ = cpu_to_be32(attr->ia_uid); |
| } else |
| *p++ = xdr_zero; |
| |
| if (attr->ia_valid & ATTR_GID) { |
| *p++ = xdr_one; |
| *p++ = cpu_to_be32(attr->ia_gid); |
| } else |
| *p++ = xdr_zero; |
| |
| if (attr->ia_valid & ATTR_SIZE) { |
| *p++ = xdr_one; |
| p = xdr_encode_hyper(p, (u64)attr->ia_size); |
| } else |
| *p++ = xdr_zero; |
| |
| if (attr->ia_valid & ATTR_ATIME_SET) { |
| *p++ = xdr_two; |
| p = xdr_encode_nfstime3(p, &attr->ia_atime); |
| } else if (attr->ia_valid & ATTR_ATIME) { |
| *p++ = xdr_one; |
| } else |
| *p++ = xdr_zero; |
| |
| if (attr->ia_valid & ATTR_MTIME_SET) { |
| *p++ = xdr_two; |
| xdr_encode_nfstime3(p, &attr->ia_mtime); |
| } else if (attr->ia_valid & ATTR_MTIME) { |
| *p = xdr_one; |
| } else |
| *p = xdr_zero; |
| } |
| |
| /* |
| * fattr3 |
| * |
| * struct fattr3 { |
| * ftype3 type; |
| * mode3 mode; |
| * uint32 nlink; |
| * uid3 uid; |
| * gid3 gid; |
| * size3 size; |
| * size3 used; |
| * specdata3 rdev; |
| * uint64 fsid; |
| * fileid3 fileid; |
| * nfstime3 atime; |
| * nfstime3 mtime; |
| * nfstime3 ctime; |
| * }; |
| */ |
| static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) |
| { |
| umode_t fmode; |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| |
| p = xdr_decode_ftype3(p, &fmode); |
| |
| fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; |
| fattr->nlink = be32_to_cpup(p++); |
| fattr->uid = be32_to_cpup(p++); |
| fattr->gid = be32_to_cpup(p++); |
| |
| p = xdr_decode_size3(p, &fattr->size); |
| p = xdr_decode_size3(p, &fattr->du.nfs3.used); |
| p = xdr_decode_specdata3(p, &fattr->rdev); |
| |
| p = xdr_decode_hyper(p, &fattr->fsid.major); |
| fattr->fsid.minor = 0; |
| |
| p = xdr_decode_fileid3(p, &fattr->fileid); |
| p = xdr_decode_nfstime3(p, &fattr->atime); |
| p = xdr_decode_nfstime3(p, &fattr->mtime); |
| xdr_decode_nfstime3(p, &fattr->ctime); |
| |
| fattr->valid |= NFS_ATTR_FATTR_V3; |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * post_op_attr |
| * |
| * union post_op_attr switch (bool attributes_follow) { |
| * case TRUE: |
| * fattr3 attributes; |
| * case FALSE: |
| * void; |
| * }; |
| */ |
| static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| if (*p != xdr_zero) |
| return decode_fattr3(xdr, fattr); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * wcc_attr |
| * struct wcc_attr { |
| * size3 size; |
| * nfstime3 mtime; |
| * nfstime3 ctime; |
| * }; |
| */ |
| static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| |
| fattr->valid |= NFS_ATTR_FATTR_PRESIZE |
| | NFS_ATTR_FATTR_PREMTIME |
| | NFS_ATTR_FATTR_PRECTIME; |
| |
| p = xdr_decode_size3(p, &fattr->pre_size); |
| p = xdr_decode_nfstime3(p, &fattr->pre_mtime); |
| xdr_decode_nfstime3(p, &fattr->pre_ctime); |
| |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * pre_op_attr |
| * union pre_op_attr switch (bool attributes_follow) { |
| * case TRUE: |
| * wcc_attr attributes; |
| * case FALSE: |
| * void; |
| * }; |
| * |
| * wcc_data |
| * |
| * struct wcc_data { |
| * pre_op_attr before; |
| * post_op_attr after; |
| * }; |
| */ |
| static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| if (*p != xdr_zero) |
| return decode_wcc_attr(xdr, fattr); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) |
| { |
| int error; |
| |
| error = decode_pre_op_attr(xdr, fattr); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(xdr, fattr); |
| out: |
| return error; |
| } |
| |
| /* |
| * post_op_fh3 |
| * |
| * union post_op_fh3 switch (bool handle_follows) { |
| * case TRUE: |
| * nfs_fh3 handle; |
| * case FALSE: |
| * void; |
| * }; |
| */ |
| static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
| { |
| __be32 *p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| if (*p != xdr_zero) |
| return decode_nfs_fh3(xdr, fh); |
| zero_nfs_fh3(fh); |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| /* |
| * diropargs3 |
| * |
| * struct diropargs3 { |
| * nfs_fh3 dir; |
| * filename3 name; |
| * }; |
| */ |
| static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, |
| const char *name, u32 length) |
| { |
| encode_nfs_fh3(xdr, fh); |
| encode_filename3(xdr, name, length); |
| } |
| |
| |
| /* |
| * NFSv3 XDR encode functions |
| * |
| * NFSv3 argument types are defined in section 3.3 of RFC 1813: |
| * "NFS Version 3 Protocol Specification". |
| */ |
| |
| /* |
| * 3.3.1 GETATTR3args |
| * |
| * struct GETATTR3args { |
| * nfs_fh3 object; |
| * }; |
| */ |
| static int nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_fh *fh) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, fh); |
| return 0; |
| } |
| |
| /* |
| * 3.3.2 SETATTR3args |
| * |
| * union sattrguard3 switch (bool check) { |
| * case TRUE: |
| * nfstime3 obj_ctime; |
| * case FALSE: |
| * void; |
| * }; |
| * |
| * struct SETATTR3args { |
| * nfs_fh3 object; |
| * sattr3 new_attributes; |
| * sattrguard3 guard; |
| * }; |
| */ |
| static void encode_sattrguard3(struct xdr_stream *xdr, |
| const struct nfs3_sattrargs *args) |
| { |
| __be32 *p; |
| |
| if (args->guard) { |
| p = xdr_reserve_space(xdr, 4 + 8); |
| *p++ = xdr_one; |
| xdr_encode_nfstime3(p, &args->guardtime); |
| } else { |
| p = xdr_reserve_space(xdr, 4); |
| *p = xdr_zero; |
| } |
| } |
| |
| static int nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_sattrargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, args->fh); |
| encode_sattr3(&xdr, args->sattr); |
| encode_sattrguard3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.3 LOOKUP3args |
| * |
| * struct LOOKUP3args { |
| * diropargs3 what; |
| * }; |
| */ |
| static int nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_diropargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| return 0; |
| } |
| |
| /* |
| * 3.3.4 ACCESS3args |
| * |
| * struct ACCESS3args { |
| * nfs_fh3 object; |
| * uint32 access; |
| * }; |
| */ |
| static void encode_access3args(struct xdr_stream *xdr, |
| const struct nfs3_accessargs *args) |
| { |
| encode_nfs_fh3(xdr, args->fh); |
| encode_uint32(xdr, args->access); |
| } |
| |
| static int nfs3_xdr_enc_access3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_accessargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_access3args(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.5 READLINK3args |
| * |
| * struct READLINK3args { |
| * nfs_fh3 symlink; |
| * }; |
| */ |
| static int nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_readlinkargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, args->fh); |
| prepare_reply_buffer(req, args->pages, args->pgbase, |
| args->pglen, NFS3_readlinkres_sz); |
| return 0; |
| } |
| |
| /* |
| * 3.3.6 READ3args |
| * |
| * struct READ3args { |
| * nfs_fh3 file; |
| * offset3 offset; |
| * count3 count; |
| * }; |
| */ |
| static void encode_read3args(struct xdr_stream *xdr, |
| const struct nfs_readargs *args) |
| { |
| __be32 *p; |
| |
| encode_nfs_fh3(xdr, args->fh); |
| |
| p = xdr_reserve_space(xdr, 8 + 4); |
| p = xdr_encode_hyper(p, args->offset); |
| *p = cpu_to_be32(args->count); |
| } |
| |
| static int nfs3_xdr_enc_read3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_readargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_read3args(&xdr, args); |
| prepare_reply_buffer(req, args->pages, args->pgbase, |
| args->count, NFS3_readres_sz); |
| req->rq_rcv_buf.flags |= XDRBUF_READ; |
| return 0; |
| } |
| |
| /* |
| * 3.3.7 WRITE3args |
| * |
| * enum stable_how { |
| * UNSTABLE = 0, |
| * DATA_SYNC = 1, |
| * FILE_SYNC = 2 |
| * }; |
| * |
| * struct WRITE3args { |
| * nfs_fh3 file; |
| * offset3 offset; |
| * count3 count; |
| * stable_how stable; |
| * opaque data<>; |
| * }; |
| */ |
| static void encode_write3args(struct xdr_stream *xdr, |
| const struct nfs_writeargs *args) |
| { |
| __be32 *p; |
| |
| encode_nfs_fh3(xdr, args->fh); |
| |
| p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); |
| p = xdr_encode_hyper(p, args->offset); |
| *p++ = cpu_to_be32(args->count); |
| *p++ = cpu_to_be32(args->stable); |
| *p = cpu_to_be32(args->count); |
| xdr_write_pages(xdr, args->pages, args->pgbase, args->count); |
| } |
| |
| static int nfs3_xdr_enc_write3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_writeargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_write3args(&xdr, args); |
| xdr.buf->flags |= XDRBUF_WRITE; |
| return 0; |
| } |
| |
| /* |
| * 3.3.8 CREATE3args |
| * |
| * enum createmode3 { |
| * UNCHECKED = 0, |
| * GUARDED = 1, |
| * EXCLUSIVE = 2 |
| * }; |
| * |
| * union createhow3 switch (createmode3 mode) { |
| * case UNCHECKED: |
| * case GUARDED: |
| * sattr3 obj_attributes; |
| * case EXCLUSIVE: |
| * createverf3 verf; |
| * }; |
| * |
| * struct CREATE3args { |
| * diropargs3 where; |
| * createhow3 how; |
| * }; |
| */ |
| static void encode_createhow3(struct xdr_stream *xdr, |
| const struct nfs3_createargs *args) |
| { |
| encode_uint32(xdr, args->createmode); |
| switch (args->createmode) { |
| case NFS3_CREATE_UNCHECKED: |
| case NFS3_CREATE_GUARDED: |
| encode_sattr3(xdr, args->sattr); |
| break; |
| case NFS3_CREATE_EXCLUSIVE: |
| encode_createverf3(xdr, args->verifier); |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| static int nfs3_xdr_enc_create3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_createargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| encode_createhow3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.9 MKDIR3args |
| * |
| * struct MKDIR3args { |
| * diropargs3 where; |
| * sattr3 attributes; |
| * }; |
| */ |
| static int nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_mkdirargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| encode_sattr3(&xdr, args->sattr); |
| return 0; |
| } |
| |
| /* |
| * 3.3.10 SYMLINK3args |
| * |
| * struct symlinkdata3 { |
| * sattr3 symlink_attributes; |
| * nfspath3 symlink_data; |
| * }; |
| * |
| * struct SYMLINK3args { |
| * diropargs3 where; |
| * symlinkdata3 symlink; |
| * }; |
| */ |
| static void encode_symlinkdata3(struct xdr_stream *xdr, |
| const struct nfs3_symlinkargs *args) |
| { |
| encode_sattr3(xdr, args->sattr); |
| encode_nfspath3(xdr, args->pages, args->pathlen); |
| } |
| |
| static int nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_symlinkargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fromfh, args->fromname, args->fromlen); |
| encode_symlinkdata3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.11 MKNOD3args |
| * |
| * struct devicedata3 { |
| * sattr3 dev_attributes; |
| * specdata3 spec; |
| * }; |
| * |
| * union mknoddata3 switch (ftype3 type) { |
| * case NF3CHR: |
| * case NF3BLK: |
| * devicedata3 device; |
| * case NF3SOCK: |
| * case NF3FIFO: |
| * sattr3 pipe_attributes; |
| * default: |
| * void; |
| * }; |
| * |
| * struct MKNOD3args { |
| * diropargs3 where; |
| * mknoddata3 what; |
| * }; |
| */ |
| static void encode_devicedata3(struct xdr_stream *xdr, |
| const struct nfs3_mknodargs *args) |
| { |
| encode_sattr3(xdr, args->sattr); |
| encode_specdata3(xdr, args->rdev); |
| } |
| |
| static void encode_mknoddata3(struct xdr_stream *xdr, |
| const struct nfs3_mknodargs *args) |
| { |
| encode_ftype3(xdr, args->type); |
| switch (args->type) { |
| case NF3CHR: |
| case NF3BLK: |
| encode_devicedata3(xdr, args); |
| break; |
| case NF3SOCK: |
| case NF3FIFO: |
| encode_sattr3(xdr, args->sattr); |
| break; |
| case NF3REG: |
| case NF3DIR: |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| static int nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_mknodargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name, args->len); |
| encode_mknoddata3(&xdr, args); |
| return 0; |
| } |
| |
| /* |
| * 3.3.12 REMOVE3args |
| * |
| * struct REMOVE3args { |
| * diropargs3 object; |
| * }; |
| */ |
| static int nfs3_xdr_enc_remove3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_removeargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->fh, args->name.name, args->name.len); |
| return 0; |
| } |
| |
| /* |
| * 3.3.14 RENAME3args |
| * |
| * struct RENAME3args { |
| * diropargs3 from; |
| * diropargs3 to; |
| * }; |
| */ |
| static int nfs3_xdr_enc_rename3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_renameargs *args) |
| { |
| const struct qstr *old = args->old_name; |
| const struct qstr *new = args->new_name; |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_diropargs3(&xdr, args->old_dir, old->name, old->len); |
| encode_diropargs3(&xdr, args->new_dir, new->name, new->len); |
| return 0; |
| } |
| |
| /* |
| * 3.3.15 LINK3args |
| * |
| * struct LINK3args { |
| * nfs_fh3 file; |
| * diropargs3 link; |
| * }; |
| */ |
| static int nfs3_xdr_enc_link3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_linkargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, args->fromfh); |
| encode_diropargs3(&xdr, args->tofh, args->toname, args->tolen); |
| return 0; |
| } |
| |
| /* |
| * 3.3.16 READDIR3args |
| * |
| * struct READDIR3args { |
| * nfs_fh3 dir; |
| * cookie3 cookie; |
| * cookieverf3 cookieverf; |
| * count3 count; |
| * }; |
| */ |
| static void encode_readdir3args(struct xdr_stream *xdr, |
| const struct nfs3_readdirargs *args) |
| { |
| __be32 *p; |
| |
| encode_nfs_fh3(xdr, args->fh); |
| |
| p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); |
| p = xdr_encode_cookie3(p, args->cookie); |
| p = xdr_encode_cookieverf3(p, args->verf); |
| *p = cpu_to_be32(args->count); |
| } |
| |
| static int nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_readdirargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_readdir3args(&xdr, args); |
| prepare_reply_buffer(req, args->pages, 0, |
| args->count, NFS3_readdirres_sz); |
| return 0; |
| } |
| |
| /* |
| * 3.3.17 READDIRPLUS3args |
| * |
| * struct READDIRPLUS3args { |
| * nfs_fh3 dir; |
| * cookie3 cookie; |
| * cookieverf3 cookieverf; |
| * count3 dircount; |
| * count3 maxcount; |
| * }; |
| */ |
| static void encode_readdirplus3args(struct xdr_stream *xdr, |
| const struct nfs3_readdirargs *args) |
| { |
| __be32 *p; |
| |
| encode_nfs_fh3(xdr, args->fh); |
| |
| p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); |
| p = xdr_encode_cookie3(p, args->cookie); |
| p = xdr_encode_cookieverf3(p, args->verf); |
| |
| /* |
| * readdirplus: need dircount + buffer size. |
| * We just make sure we make dircount big enough |
| */ |
| *p++ = cpu_to_be32(args->count >> 3); |
| |
| *p = cpu_to_be32(args->count); |
| } |
| |
| static int nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_readdirargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_readdirplus3args(&xdr, args); |
| prepare_reply_buffer(req, args->pages, 0, |
| args->count, NFS3_readdirres_sz); |
| return 0; |
| } |
| |
| /* |
| * 3.3.21 COMMIT3args |
| * |
| * struct COMMIT3args { |
| * nfs_fh3 file; |
| * offset3 offset; |
| * count3 count; |
| * }; |
| */ |
| static void encode_commit3args(struct xdr_stream *xdr, |
| const struct nfs_writeargs *args) |
| { |
| __be32 *p; |
| |
| encode_nfs_fh3(xdr, args->fh); |
| |
| p = xdr_reserve_space(xdr, 8 + 4); |
| p = xdr_encode_hyper(p, args->offset); |
| *p = cpu_to_be32(args->count); |
| } |
| |
| static int nfs3_xdr_enc_commit3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs_writeargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_commit3args(&xdr, args); |
| return 0; |
| } |
| |
| #ifdef CONFIG_NFS_V3_ACL |
| |
| static int nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_getaclargs *args) |
| { |
| struct xdr_stream xdr; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, args->fh); |
| encode_uint32(&xdr, args->mask); |
| if (args->mask & (NFS_ACL | NFS_DFACL)) |
| prepare_reply_buffer(req, args->pages, 0, |
| NFSACL_MAXPAGES << PAGE_SHIFT, |
| ACL3_getaclres_sz); |
| return 0; |
| } |
| |
| static int nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, __be32 *p, |
| const struct nfs3_setaclargs *args) |
| { |
| struct xdr_stream xdr; |
| unsigned int base; |
| int error; |
| |
| xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
| encode_nfs_fh3(&xdr, NFS_FH(args->inode)); |
| encode_uint32(&xdr, args->mask); |
| if (args->npages != 0) |
| xdr_write_pages(&xdr, args->pages, 0, args->len); |
| |
| base = req->rq_slen; |
| error = nfsacl_encode(xdr.buf, base, args->inode, |
| (args->mask & NFS_ACL) ? |
| args->acl_access : NULL, 1, 0); |
| BUG_ON(error < 0); |
| error = nfsacl_encode(xdr.buf, base + error, args->inode, |
| (args->mask & NFS_DFACL) ? |
| args->acl_default : NULL, 1, |
| NFS_ACL_DEFAULT); |
| BUG_ON(error < 0); |
| return 0; |
| } |
| |
| #endif /* CONFIG_NFS_V3_ACL */ |
| |
| /* |
| * NFSv3 XDR decode functions |
| * |
| * NFSv3 result types are defined in section 3.3 of RFC 1813: |
| * "NFS Version 3 Protocol Specification". |
| */ |
| |
| /* |
| * 3.3.1 GETATTR3res |
| * |
| * struct GETATTR3resok { |
| * fattr3 obj_attributes; |
| * }; |
| * |
| * union GETATTR3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * GETATTR3resok resok; |
| * default: |
| * void; |
| * }; |
| */ |
| static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_fattr *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_fattr3(&xdr, result); |
| out: |
| return error; |
| out_default: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.2 SETATTR3res |
| * |
| * struct SETATTR3resok { |
| * wcc_data obj_wcc; |
| * }; |
| * |
| * struct SETATTR3resfail { |
| * wcc_data obj_wcc; |
| * }; |
| * |
| * union SETATTR3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * SETATTR3resok resok; |
| * default: |
| * SETATTR3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_fattr *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_wcc_data(&xdr, result); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.3 LOOKUP3res |
| * |
| * struct LOOKUP3resok { |
| * nfs_fh3 object; |
| * post_op_attr obj_attributes; |
| * post_op_attr dir_attributes; |
| * }; |
| * |
| * struct LOOKUP3resfail { |
| * post_op_attr dir_attributes; |
| * }; |
| * |
| * union LOOKUP3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * LOOKUP3resok resok; |
| * default: |
| * LOOKUP3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs3_diropres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_nfs_fh3(&xdr, result->fh); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->dir_attr); |
| out: |
| return error; |
| out_default: |
| error = decode_post_op_attr(&xdr, result->dir_attr); |
| if (unlikely(error)) |
| goto out; |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.4 ACCESS3res |
| * |
| * struct ACCESS3resok { |
| * post_op_attr obj_attributes; |
| * uint32 access; |
| * }; |
| * |
| * struct ACCESS3resfail { |
| * post_op_attr obj_attributes; |
| * }; |
| * |
| * union ACCESS3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * ACCESS3resok resok; |
| * default: |
| * ACCESS3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs3_accessres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_uint32(&xdr, &result->access); |
| out: |
| return error; |
| out_default: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.5 READLINK3res |
| * |
| * struct READLINK3resok { |
| * post_op_attr symlink_attributes; |
| * nfspath3 data; |
| * }; |
| * |
| * struct READLINK3resfail { |
| * post_op_attr symlink_attributes; |
| * }; |
| * |
| * union READLINK3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * READLINK3resok resok; |
| * default: |
| * READLINK3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_fattr *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_nfspath3(&xdr); |
| out: |
| return error; |
| out_default: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.6 READ3res |
| * |
| * struct READ3resok { |
| * post_op_attr file_attributes; |
| * count3 count; |
| * bool eof; |
| * opaque data<>; |
| * }; |
| * |
| * struct READ3resfail { |
| * post_op_attr file_attributes; |
| * }; |
| * |
| * union READ3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * READ3resok resok; |
| * default: |
| * READ3resfail resfail; |
| * }; |
| */ |
| static int decode_read3resok(struct xdr_stream *xdr, |
| struct nfs_readres *result) |
| { |
| u32 eof, count, ocount, recvd; |
| size_t hdrlen; |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4 + 4 + 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| count = be32_to_cpup(p++); |
| eof = be32_to_cpup(p++); |
| ocount = be32_to_cpup(p++); |
| if (unlikely(ocount != count)) |
| goto out_mismatch; |
| hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; |
| recvd = xdr->buf->len - hdrlen; |
| if (unlikely(count > recvd)) |
| goto out_cheating; |
| |
| out: |
| xdr_read_pages(xdr, count); |
| result->eof = eof; |
| result->count = count; |
| return count; |
| out_mismatch: |
| dprintk("NFS: READ count doesn't match length of opaque: " |
| "count %u != ocount %u\n", count, ocount); |
| return -EIO; |
| out_cheating: |
| dprintk("NFS: server cheating in read result: " |
| "count %u > recvd %u\n", count, recvd); |
| count = recvd; |
| eof = 0; |
| goto out; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_readres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| error = decode_read3resok(&xdr, result); |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.7 WRITE3res |
| * |
| * enum stable_how { |
| * UNSTABLE = 0, |
| * DATA_SYNC = 1, |
| * FILE_SYNC = 2 |
| * }; |
| * |
| * struct WRITE3resok { |
| * wcc_data file_wcc; |
| * count3 count; |
| * stable_how committed; |
| * writeverf3 verf; |
| * }; |
| * |
| * struct WRITE3resfail { |
| * wcc_data file_wcc; |
| * }; |
| * |
| * union WRITE3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * WRITE3resok resok; |
| * default: |
| * WRITE3resfail resfail; |
| * }; |
| */ |
| static int decode_write3resok(struct xdr_stream *xdr, |
| struct nfs_writeres *result) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| result->count = be32_to_cpup(p++); |
| result->verf->committed = be32_to_cpup(p++); |
| if (unlikely(result->verf->committed > NFS_FILE_SYNC)) |
| goto out_badvalue; |
| memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE); |
| return result->count; |
| out_badvalue: |
| dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); |
| return -EIO; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_writeres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_wcc_data(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| error = decode_write3resok(&xdr, result); |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.8 CREATE3res |
| * |
| * struct CREATE3resok { |
| * post_op_fh3 obj; |
| * post_op_attr obj_attributes; |
| * wcc_data dir_wcc; |
| * }; |
| * |
| * struct CREATE3resfail { |
| * wcc_data dir_wcc; |
| * }; |
| * |
| * union CREATE3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * CREATE3resok resok; |
| * default: |
| * CREATE3resfail resfail; |
| * }; |
| */ |
| static int decode_create3resok(struct xdr_stream *xdr, |
| struct nfs3_diropres *result) |
| { |
| int error; |
| |
| error = decode_post_op_fh3(xdr, result->fh); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| /* The server isn't required to return a file handle. |
| * If it didn't, force the client to perform a LOOKUP |
| * to determine the correct file handle and attribute |
| * values for the new object. */ |
| if (result->fh->size == 0) |
| result->fattr->valid = 0; |
| error = decode_wcc_data(xdr, result->dir_attr); |
| out: |
| return error; |
| } |
| |
| static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs3_diropres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_create3resok(&xdr, result); |
| out: |
| return error; |
| out_default: |
| error = decode_wcc_data(&xdr, result->dir_attr); |
| if (unlikely(error)) |
| goto out; |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.12 REMOVE3res |
| * |
| * struct REMOVE3resok { |
| * wcc_data dir_wcc; |
| * }; |
| * |
| * struct REMOVE3resfail { |
| * wcc_data dir_wcc; |
| * }; |
| * |
| * union REMOVE3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * REMOVE3resok resok; |
| * default: |
| * REMOVE3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_removeres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_wcc_data(&xdr, result->dir_attr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.14 RENAME3res |
| * |
| * struct RENAME3resok { |
| * wcc_data fromdir_wcc; |
| * wcc_data todir_wcc; |
| * }; |
| * |
| * struct RENAME3resfail { |
| * wcc_data fromdir_wcc; |
| * wcc_data todir_wcc; |
| * }; |
| * |
| * union RENAME3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * RENAME3resok resok; |
| * default: |
| * RENAME3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_renameres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_wcc_data(&xdr, result->old_fattr); |
| if (unlikely(error)) |
| goto out; |
| error = decode_wcc_data(&xdr, result->new_fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.15 LINK3res |
| * |
| * struct LINK3resok { |
| * post_op_attr file_attributes; |
| * wcc_data linkdir_wcc; |
| * }; |
| * |
| * struct LINK3resfail { |
| * post_op_attr file_attributes; |
| * wcc_data linkdir_wcc; |
| * }; |
| * |
| * union LINK3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * LINK3resok resok; |
| * default: |
| * LINK3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs3_linkres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| error = decode_wcc_data(&xdr, result->dir_attr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /** |
| * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in |
| * the local page cache |
| * @xdr: XDR stream where entry resides |
| * @entry: buffer to fill in with entry data |
| * @server: nfs_server data for this directory |
| * @plus: boolean indicating whether this should be a readdirplus entry |
| * |
| * Returns the position of the next item in the buffer, or an ERR_PTR. |
| * |
| * This function is not invoked during READDIR reply decoding, but |
| * rather whenever an application invokes the getdents(2) system call |
| * on a directory already in our cache. |
| * |
| * 3.3.16 entry3 |
| * |
| * struct entry3 { |
| * fileid3 fileid; |
| * filename3 name; |
| * cookie3 cookie; |
| * fhandle3 filehandle; |
| * post_op_attr3 attributes; |
| * entry3 *nextentry; |
| * }; |
| * |
| * 3.3.17 entryplus3 |
| * struct entryplus3 { |
| * fileid3 fileid; |
| * filename3 name; |
| * cookie3 cookie; |
| * post_op_attr name_attributes; |
| * post_op_fh3 name_handle; |
| * entryplus3 *nextentry; |
| * }; |
| */ |
| __be32 *nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
| struct nfs_server *server, int plus) |
| { |
| struct nfs_entry old = *entry; |
| __be32 *p; |
| int error; |
| |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| if (*p == xdr_zero) { |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| if (*p == xdr_zero) |
| return ERR_PTR(-EAGAIN); |
| entry->eof = 1; |
| return ERR_PTR(-EBADCOOKIE); |
| } |
| |
| error = decode_fileid3(xdr, &entry->ino); |
| if (unlikely(error)) |
| return ERR_PTR(error); |
| |
| error = decode_inline_filename3(xdr, &entry->name, &entry->len); |
| if (unlikely(error)) |
| return ERR_PTR(error); |
| |
| entry->prev_cookie = entry->cookie; |
| error = decode_cookie3(xdr, &entry->cookie); |
| if (unlikely(error)) |
| return ERR_PTR(error); |
| |
| entry->d_type = DT_UNKNOWN; |
| |
| if (plus) { |
| entry->fattr->valid = 0; |
| error = decode_post_op_attr(xdr, entry->fattr); |
| if (unlikely(error)) |
| return ERR_PTR(error); |
| if (entry->fattr->valid & NFS_ATTR_FATTR_V3) |
| entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); |
| |
| /* In fact, a post_op_fh3: */ |
| p = xdr_inline_decode(xdr, 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| if (*p != xdr_zero) { |
| error = decode_nfs_fh3(xdr, entry->fh); |
| if (unlikely(error)) { |
| if (error == -E2BIG) |
| goto out_truncated; |
| return ERR_PTR(error); |
| } |
| } else |
| zero_nfs_fh3(entry->fh); |
| } |
| |
| /* Peek at the next entry to see if we're at EOD */ |
| p = xdr_inline_peek(xdr, 4 + 4); |
| entry->eof = 0; |
| if (p != NULL) |
| entry->eof = (p[0] == xdr_zero) && (p[1] != xdr_zero); |
| return p; |
| |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return ERR_PTR(-EAGAIN); |
| out_truncated: |
| dprintk("NFS: directory entry contains invalid file handle\n"); |
| *entry = old; |
| return ERR_PTR(-EAGAIN); |
| } |
| |
| /* |
| * 3.3.16 READDIR3res |
| * |
| * struct dirlist3 { |
| * entry3 *entries; |
| * bool eof; |
| * }; |
| * |
| * struct READDIR3resok { |
| * post_op_attr dir_attributes; |
| * cookieverf3 cookieverf; |
| * dirlist3 reply; |
| * }; |
| * |
| * struct READDIR3resfail { |
| * post_op_attr dir_attributes; |
| * }; |
| * |
| * union READDIR3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * READDIR3resok resok; |
| * default: |
| * READDIR3resfail resfail; |
| * }; |
| * |
| * Read the directory contents into the page cache, but otherwise |
| * don't touch them. The actual decoding is done by nfs3_decode_entry() |
| * during subsequent nfs_readdir() calls. |
| */ |
| static int decode_dirlist3(struct xdr_stream *xdr) |
| { |
| u32 recvd, pglen; |
| size_t hdrlen; |
| |
| pglen = xdr->buf->page_len; |
| hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; |
| recvd = xdr->buf->len - hdrlen; |
| if (unlikely(pglen > recvd)) |
| goto out_cheating; |
| out: |
| xdr_read_pages(xdr, pglen); |
| return pglen; |
| out_cheating: |
| dprintk("NFS: server cheating in readdir result: " |
| "pglen %u > recvd %u\n", pglen, recvd); |
| pglen = recvd; |
| goto out; |
| } |
| |
| static int decode_readdir3resok(struct xdr_stream *xdr, |
| struct nfs3_readdirres *result) |
| { |
| int error; |
| |
| error = decode_post_op_attr(xdr, result->dir_attr); |
| if (unlikely(error)) |
| goto out; |
| /* XXX: do we need to check if result->verf != NULL ? */ |
| error = decode_cookieverf3(xdr, result->verf); |
| if (unlikely(error)) |
| goto out; |
| error = decode_dirlist3(xdr); |
| out: |
| return error; |
| } |
| |
| static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs3_readdirres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_readdir3resok(&xdr, result); |
| out: |
| return error; |
| out_default: |
| error = decode_post_op_attr(&xdr, result->dir_attr); |
| if (unlikely(error)) |
| goto out; |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.18 FSSTAT3res |
| * |
| * struct FSSTAT3resok { |
| * post_op_attr obj_attributes; |
| * size3 tbytes; |
| * size3 fbytes; |
| * size3 abytes; |
| * size3 tfiles; |
| * size3 ffiles; |
| * size3 afiles; |
| * uint32 invarsec; |
| * }; |
| * |
| * struct FSSTAT3resfail { |
| * post_op_attr obj_attributes; |
| * }; |
| * |
| * union FSSTAT3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * FSSTAT3resok resok; |
| * default: |
| * FSSTAT3resfail resfail; |
| * }; |
| */ |
| static int decode_fsstat3resok(struct xdr_stream *xdr, |
| struct nfs_fsstat *result) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 8 * 6 + 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| p = xdr_decode_size3(p, &result->tbytes); |
| p = xdr_decode_size3(p, &result->fbytes); |
| p = xdr_decode_size3(p, &result->abytes); |
| p = xdr_decode_size3(p, &result->tfiles); |
| p = xdr_decode_size3(p, &result->ffiles); |
| xdr_decode_size3(p, &result->afiles); |
| /* ignore invarsec */ |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_fsstat *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| error = decode_fsstat3resok(&xdr, result); |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.19 FSINFO3res |
| * |
| * struct FSINFO3resok { |
| * post_op_attr obj_attributes; |
| * uint32 rtmax; |
| * uint32 rtpref; |
| * uint32 rtmult; |
| * uint32 wtmax; |
| * uint32 wtpref; |
| * uint32 wtmult; |
| * uint32 dtpref; |
| * size3 maxfilesize; |
| * nfstime3 time_delta; |
| * uint32 properties; |
| * }; |
| * |
| * struct FSINFO3resfail { |
| * post_op_attr obj_attributes; |
| * }; |
| * |
| * union FSINFO3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * FSINFO3resok resok; |
| * default: |
| * FSINFO3resfail resfail; |
| * }; |
| */ |
| static int decode_fsinfo3resok(struct xdr_stream *xdr, |
| struct nfs_fsinfo *result) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| result->rtmax = be32_to_cpup(p++); |
| result->rtpref = be32_to_cpup(p++); |
| result->rtmult = be32_to_cpup(p++); |
| result->wtmax = be32_to_cpup(p++); |
| result->wtpref = be32_to_cpup(p++); |
| result->wtmult = be32_to_cpup(p++); |
| result->dtpref = be32_to_cpup(p++); |
| p = xdr_decode_size3(p, &result->maxfilesize); |
| xdr_decode_nfstime3(p, &result->time_delta); |
| |
| /* ignore properties */ |
| result->lease_time = 0; |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_fsinfo *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| error = decode_fsinfo3resok(&xdr, result); |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.20 PATHCONF3res |
| * |
| * struct PATHCONF3resok { |
| * post_op_attr obj_attributes; |
| * uint32 linkmax; |
| * uint32 name_max; |
| * bool no_trunc; |
| * bool chown_restricted; |
| * bool case_insensitive; |
| * bool case_preserving; |
| * }; |
| * |
| * struct PATHCONF3resfail { |
| * post_op_attr obj_attributes; |
| * }; |
| * |
| * union PATHCONF3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * PATHCONF3resok resok; |
| * default: |
| * PATHCONF3resfail resfail; |
| * }; |
| */ |
| static int decode_pathconf3resok(struct xdr_stream *xdr, |
| struct nfs_pathconf *result) |
| { |
| __be32 *p; |
| |
| p = xdr_inline_decode(xdr, 4 * 6); |
| if (unlikely(p == NULL)) |
| goto out_overflow; |
| result->max_link = be32_to_cpup(p++); |
| result->max_namelen = be32_to_cpup(p); |
| /* ignore remaining fields */ |
| return 0; |
| out_overflow: |
| print_overflow_msg(__func__, xdr); |
| return -EIO; |
| } |
| |
| static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_pathconf *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_post_op_attr(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| error = decode_pathconf3resok(&xdr, result); |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| /* |
| * 3.3.21 COMMIT3res |
| * |
| * struct COMMIT3resok { |
| * wcc_data file_wcc; |
| * writeverf3 verf; |
| * }; |
| * |
| * struct COMMIT3resfail { |
| * wcc_data file_wcc; |
| * }; |
| * |
| * union COMMIT3res switch (nfsstat3 status) { |
| * case NFS3_OK: |
| * COMMIT3resok resok; |
| * default: |
| * COMMIT3resfail resfail; |
| * }; |
| */ |
| static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_writeres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| error = decode_wcc_data(&xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_status; |
| error = decode_writeverf3(&xdr, result->verf->verifier); |
| out: |
| return error; |
| out_status: |
| return nfs_stat_to_errno(status); |
| } |
| |
| #ifdef CONFIG_NFS_V3_ACL |
| |
| static inline int decode_getacl3resok(struct xdr_stream *xdr, |
| struct nfs3_getaclres *result) |
| { |
| struct posix_acl **acl; |
| unsigned int *aclcnt; |
| size_t hdrlen; |
| int error; |
| |
| error = decode_post_op_attr(xdr, result->fattr); |
| if (unlikely(error)) |
| goto out; |
| error = decode_uint32(xdr, &result->mask); |
| if (unlikely(error)) |
| goto out; |
| error = -EINVAL; |
| if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) |
| goto out; |
| |
| hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; |
| |
| acl = NULL; |
| if (result->mask & NFS_ACL) |
| acl = &result->acl_access; |
| aclcnt = NULL; |
| if (result->mask & NFS_ACLCNT) |
| aclcnt = &result->acl_access_count; |
| error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); |
| if (unlikely(error <= 0)) |
| goto out; |
| |
| acl = NULL; |
| if (result->mask & NFS_DFACL) |
| acl = &result->acl_default; |
| aclcnt = NULL; |
| if (result->mask & NFS_DFACLCNT) |
| aclcnt = &result->acl_default_count; |
| error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); |
| if (unlikely(error <= 0)) |
| return error; |
| error = 0; |
| out: |
| return error; |
| } |
| |
| static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs3_getaclres *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_getacl3resok(&xdr, result); |
| out: |
| return error; |
| out_default: |
| return nfs_stat_to_errno(status); |
| } |
| |
| static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, __be32 *p, |
| struct nfs_fattr *result) |
| { |
| struct xdr_stream xdr; |
| enum nfs_stat status; |
| int error; |
| |
| xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| error = decode_nfsstat3(&xdr, &status); |
| if (unlikely(error)) |
| goto out; |
| if (status != NFS3_OK) |
| goto out_default; |
| error = decode_post_op_attr(&xdr, result); |
| out: |
| return error; |
| out_default: |
| return nfs_stat_to_errno(status); |
| } |
| |
| #endif /* CONFIG_NFS_V3_ACL */ |
| |
| #define PROC(proc, argtype, restype, timer) \ |
| [NFS3PROC_##proc] = { \ |
| .p_proc = NFS3PROC_##proc, \ |
| .p_encode = (kxdrproc_t)nfs3_xdr_enc_##argtype##3args, \ |
| .p_decode = (kxdrproc_t)nfs3_xdr_dec_##restype##3res, \ |
| .p_arglen = NFS3_##argtype##args_sz, \ |
| .p_replen = NFS3_##restype##res_sz, \ |
| .p_timer = timer, \ |
| .p_statidx = NFS3PROC_##proc, \ |
| .p_name = #proc, \ |
| } |
| |
| struct rpc_procinfo nfs3_procedures[] = { |
| PROC(GETATTR, getattr, getattr, 1), |
| PROC(SETATTR, setattr, setattr, 0), |
| PROC(LOOKUP, lookup, lookup, 2), |
| PROC(ACCESS, access, access, 1), |
| PROC(READLINK, readlink, readlink, 3), |
| PROC(READ, read, read, 3), |
| PROC(WRITE, write, write, 4), |
| PROC(CREATE, create, create, 0), |
| PROC(MKDIR, mkdir, create, 0), |
| PROC(SYMLINK, symlink, create, 0), |
| PROC(MKNOD, mknod, create, 0), |
| PROC(REMOVE, remove, remove, 0), |
| PROC(RMDIR, lookup, setattr, 0), |
| PROC(RENAME, rename, rename, 0), |
| PROC(LINK, link, link, 0), |
| PROC(READDIR, readdir, readdir, 3), |
| PROC(READDIRPLUS, readdirplus, readdir, 3), |
| PROC(FSSTAT, getattr, fsstat, 0), |
| PROC(FSINFO, getattr, fsinfo, 0), |
| PROC(PATHCONF, getattr, pathconf, 0), |
| PROC(COMMIT, commit, commit, 5), |
| }; |
| |
| struct rpc_version nfs_version3 = { |
| .number = 3, |
| .nrprocs = ARRAY_SIZE(nfs3_procedures), |
| .procs = nfs3_procedures |
| }; |
| |
| #ifdef CONFIG_NFS_V3_ACL |
| static struct rpc_procinfo nfs3_acl_procedures[] = { |
| [ACLPROC3_GETACL] = { |
| .p_proc = ACLPROC3_GETACL, |
| .p_encode = (kxdrproc_t)nfs3_xdr_enc_getacl3args, |
| .p_decode = (kxdrproc_t)nfs3_xdr_dec_getacl3res, |
| .p_arglen = ACL3_getaclargs_sz, |
| .p_replen = ACL3_getaclres_sz, |
| .p_timer = 1, |
| .p_name = "GETACL", |
| }, |
| [ACLPROC3_SETACL] = { |
| .p_proc = ACLPROC3_SETACL, |
| .p_encode = (kxdrproc_t)nfs3_xdr_enc_setacl3args, |
| .p_decode = (kxdrproc_t)nfs3_xdr_dec_setacl3res, |
| .p_arglen = ACL3_setaclargs_sz, |
| .p_replen = ACL3_setaclres_sz, |
| .p_timer = 0, |
| .p_name = "SETACL", |
| }, |
| }; |
| |
| struct rpc_version nfsacl_version3 = { |
| .number = 3, |
| .nrprocs = sizeof(nfs3_acl_procedures)/ |
| sizeof(nfs3_acl_procedures[0]), |
| .procs = nfs3_acl_procedures, |
| }; |
| #endif /* CONFIG_NFS_V3_ACL */ |